Caseback Screws Compatible with IWC Portuguese Chronograph IW371604

Restore secure case closure with this replacement caseback screw, designed for watch cases compatible with the IWC Portuguese Chronograph IW371604. These screws are ideal for replacing worn, stripped, or missing originals during servicing or case refurbishment.

Manufactured to match the original thread profile, head design, and length specifications, they provide reliable fastening and proper alignment with the caseback when installed correctly. Precision machining ensures consistent fitment and secure engagement.

Professional installation is recommended to prevent thread damage and ensure proper case sealing.

(Compatible replacement part — brand names used for identification purposes only.)

Product Specifications

• Product Type: Caseback screw

• Compatibility: IWC Portuguese Chronograph IW371604

• Material: Stainless Steel

• Construction: Matches original thread and head dimensions

• Application: Caseback repair, servicing, restoration